Portable electric-lighting apparatus.



B. H. HIRSCH. PORTABLE ELECT-MG LiGHTu-m APPARATUS. AYPLIGATION TILBD MAR.3.1913.

Patented Dee. 15,1914

` Iii HIRAM HARRY HIRSCH, OF FHILADELPHIA, PENNSYLVANIA.

PGP-.TABLE ELECTRIC-LIGHTNG APPARATUS.

mene-ia.

Application led March 3. 1913.

Re it known that l. llinmt tl. llinscn. a citizen nt the lvnited States. rr iding`r at Philadelphia. in the State nl' Pennsylvania.

ha\'c invented a ii-r in ne aud useiill lIniirmenient in Pra-taule lilerzriiwligliting pparatiifi. whereul the tnllnwintr is a speciliratimi. rcterein'fry Enfin; l. tl the acrninA panting drawing.

M V invention relale iin ari'niratn`l iin-hiding an incandescent ng; in cnlnciatiw reA latinn with a eti'irafge halii-rjf iniiided with num tf" attarh it tu the nw-wn nt n miner nr other niicratnr. and prin-idw n ,call-tv rallur the lanip designed t exiinn'unh thiA light [n prevent ignitinn nl' lirw-.aniyi fir other explosive gaaes when ilahl casing' iQ iectt-d tu strwees tending ln luzeak the lamp.

As: hereinafter described in); inveiition includes a lamp casing and removable eurer provided With a transparent lens 0r panel. normali. assembled in nnhstantinllj. hermetiycal relation; Said casing having dibtifnzt on v positeb polarized element;` included in the. lamp ciirenit. so cenftrncted and arrangl'rd that they are shifted to modify the lamp circuit and instantaneonslf.' extinguish the lnni". whenever said casing; ,is crushed ur punrttn'ed.

My invention includes the various novel features or construction and arrai'igeinent hereinafter more detinitely specified.

ln the drawings:--Figure a vertical sertinnal 'View at a lamp casing conveniently einlredjring my invention and indicating its operative connection with a storage battery. Fin: ll. is a fragmentary front. View of said ra ing with the cover renim'ed. ll.' is a 'ragnnu "y Sectional View Similar to Fig. l lait-ehwfing the casingelnnents short cirifuittd hy crushing the casing. Fig. 1V is a fragmentary sectional vien' similar to Fig. l liut hnwing the casing elements shifted tn hreal the lanip circuit by removal of the transpnW-nt panel. lli-TQ V and Vl are trae'nientari' sectional Views of n medit'ed liwrn'i nl in; invention. including; elements adapted to ehnrt circuit the lamp when the punt-hired. seid views Showing -pectiii'ely in normal and @hert It. ring te the torni o? my invent-inn shownin Figs. to Dr inclusive; the lamp casing inclut es the outer metallic casing or shell l having the screw thread. Q to detach Specification of Letters Patent.

,Patented Der. 15, 1914.

Serial No. 751,837.

` nhl)Y engage the cover 2). and haring the socket nl' insulatinjdr matt-rial #l supporting the inner metalli(^ casing tr "hell .i prnridcd with the ren thread l te receive the inrandesf'ent electric lamp T: aid `dicll .'i eerv- 'ntr as a reflector tor thi` latter. Said .shell 5 inalns electrical mutant with the metallic sleeve terminal 1\' nl' aid lamp which has the nther' inrlallir terminal f) in electrical runtact with theA suchet terminal lt). Said inner alfell C3 is insulated from the miter shell l in' the annular hands 1l and l2. the latter extendingV lwln'ren the V@.liunlders ll) and ll resiicctitely upon said inner and unter :hells and bracing them in .apar-ed relation; the miler edges it Said waning Shells l and 5 and in ulalin1f hand ll thrilling a Seat for the gasket lf3 nhirh preferalil)` of resilicntniaterial. se that the transparent lenay or panel 1S ir secured in suliitantially hernieticall)I araleil relatinn with Said easing when the latter is assembled as indicated in Fig. l. AS indiratcd. said outer shell l and inner shell 1' are nppositely electricallyr polarized hr snitalile connection with the stnrage linttcry lf". and said suchet.- -l also supper-ts the .nurin 2l). which extends between said outer shell l and inner Shell 5: normally in electrical nnntact with Said outer shell l at il?. and luge itil: tree end projecting thrcufzh the nun-h Ql in said inner shell s0 that it is normally upheld from the latter by the traneparent panel 23. formed of `glass or other t'rangible material. .Said shell 5 is held in said socket l and electrically connected by the screw 2% which insulated rnni the snriuga l0 and '20. lt is to he underntrmd that beth the metallic and transparent elements ot said casing are ernshable so that when either is crushed the eleetric circuit is modified to extinguish tln.` lamp T net'ore it is possible for an).r incandestwnt pnrtion ther-eet to ignite fire-damp or other "Jnina ble ganen from the atmosphere surroundin;Y said casing. For instance. as shown in Fig. TH the outer shell l has been crushed a nd displaced toward the inner Shell 5 so as to i'srinf; the spring 20 into electrical Contact therewith and thns close the circuit` includthe nntterj: lll. aside troni. the lamp and thns short. circuit und ingnish 'the latter. Aa indicated in Il' the panels 1S and Q3 have heen crushed and displaced si) to permit said Spring 2O t0 se iz-nte from the' outer shell l at and thus reak. the circuit and extinginsh tne lerne.

lll)

lit)

Although I'ind'it convenient to dispose the oppositely electrically polarized elements of the lamp casing in air spaced relation as shown in Fig. l, it is to be understood that they may be assembled in closer relation it separated by other dielectric. For instalice, as shown in Figs. V and VI the lamp casing includes the metallic shells 2U and 27 separated by insulating inatcria: and QS); sai-:l shells and 2T being similarly polarized inl connection with the battery and said shell QG beingT oppositely polarized; so that when the shell 25 is punctured, as indicated in Fig. VI the shells Q5 and t are electricallv connected by contact with each other and il' the casing is otherwise -`crushed or displaced the shell 27 comes in contact with the reflector shell which. lil-:e the shell 5 above described, is connected with the opposite pole of said battery; so that. in either case, the lamp is short circuited and extinguished.

l do notdesire to limit myself to the precise details of construction and arrangement herein set forth, as it is obvious that various niodilications niay be made therein without departing from the essential features ol my invention as deiined in the appended claims.

l claim:-

l. ln a portable electric lighting apparatus, the combination with an electric generator; of an electric lamp in circuit therewish; a substantially hcrinetical lamp cas'- inlr inclosing said lamp and havingV distinctrrmlxible portions; and a spring pressed elc- :ncnt whereby the lanip is extinguished when .said casing is punctured or otherwise crushed, the lamp circuit being broken when one crushable portion is displaced, and short circnited when another crushable portion is displaced.

2. A ininers safety lamp casing, including an incandescent electric lamp socket and having crushable' portions, and a resilient 45 element included in the electric circuit with said socket, .fuitoinaticallyy movable to break said circuit when one portion of the casing is displaced, and movable to short circuit said circuit when another portion of said casing is displaced.

3. A ininers safety lainp casing, including an electric lamp socket and having crushable portions, and an element included in the electric circuit with said socket, movable to break said circuit when one portion of the casing is displaced, and movable to short circuit said circuit when another portion of said casing is displaced.

4. A miners safety lamp, including an outer casing and an inner casing; means normally maintaining said casings in insulated relation; a spring,- pressed elementbetween said casings, normally electrically connected With the outer casing; and a crush-able element normally insulating said spring pressed element from said inner casing; whereby when said crnshable element is displaced, said spring pressed elementis electrically connected with said inner casing to short circuit the lamp.

5. A ininers safety lamp, including an outer casing and an inner casing; means porinally maintaining` said casings in insulated relation; a spring.,r pressedy element bet-Ween said casings; and a crushable element not nially insulating said spring pressed element from said inner casing; whereby when said criishahle element is displaced, said spring pressed element is electrically connected With said inner casing to short circuit the lamp. In testimony whereof, I have hereunto signed my naine at Philadelphia, Pennsylvania, this :28th day of February, 1913.

HIRAM HAR-RY HIRSCH. 'Witnesses z Y FRANCIS A. PoGooK, MlCHAEL MARKS. 

